JP2017152372A - Insulating tape - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an insulating tape used for a nonaqueous secondary battery, capable of maintaining insulating properties even under severe environments such as heating or the like and increasing the safety of a nonaqueous secondary battery.SOLUTION: The insulating tape for a nonaqueous battery includes a base material and an adhesive layer disposed on one side or both sides of the base material. The base material and/or the adhesive layer contains an insulating inorganic filler. The insulating tape for a nonaqueous battery includes a base material with an insulating layer and an adhesive layer disposed on one side or both sides of the base material with an insulating layer. The insulating layer contains an insulating inorganic filler.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an insulating tape.

  A secondary battery generally includes a structure in which a positive electrode and a negative electrode are stacked via a separator (for example, a wound body or a stacked body). The structure includes enhanced insulation and simplification of a manufacturing process. Insulating tape is used for the purpose. The insulating tape used in this way may be exposed to high temperatures during battery manufacturing processes (for example, heat drying process before electrolyte injection), charging / discharging of the battery, etc. There is a problem that is damaged. In addition, when a minute internal short circuit occurs in the secondary battery, a rapid temperature increase may occur at the short circuit part, and in the conventional insulating tape, a decrease in insulation due to the temperature increase becomes a problem.

  On the other hand, it is known to use an adhesive tape to which an inorganic filler is added as an adhesive tape used for a secondary battery. However, the addition of the inorganic filler is for the purpose of reinforcing effect, imparting heat dissipation, imparting flame retardancy, etc., and an adhesive tape (insulating tape) excellent in stability in a non-aqueous secondary battery has been obtained. Absent.

JP 2013-140765 A JP 2012-72362 A

  The present invention has been made in order to solve the above-described conventional problems, and an object of the present invention is an insulating tape used for a non-aqueous secondary battery, even under a severe environment such as being heated. An object of the present invention is to provide an insulating tape that can maintain insulation and can improve the safety of a non-aqueous secondary battery.

The insulating tape for non-aqueous batteries of the present invention comprises a base material and an adhesive layer disposed on one side or both sides of the base material, and the base material and / or the adhesive layer contains an insulating inorganic filler. .
The non-aqueous battery insulating tape of the present invention comprises a base material with an insulating layer and an adhesive layer disposed on one side or both sides of the base material with an insulating layer, and the insulating layer contains an insulating inorganic filler. .
In one embodiment, the insulating inorganic filler is an inorganic compound containing Mg, Al, Zr, Ti, or B.
In one embodiment, the insulating inorganic filler is at least one selected from the group consisting of magnesium hydroxide, magnesium carbonate, magnesium oxide, alumina, boron nitride, and titanium oxide.
In one embodiment, the insulating inorganic filler comprises a surface treatment layer of higher fatty acids, anionic surfactants, phosphate esters, silane coupling agents, titanate coupling agents or fatty acid esters of polyhydric alcohols. Have.
In one embodiment, the pressure-sensitive adhesive layer contains an acrylic polymer, and the acrylic polymer has an alkyl group having 4 or more carbon atoms in the side chain.
In one embodiment, the pressure-sensitive adhesive layer comprises butyl rubber, polyisobutylene rubber, styrene / ethylene / butylene / styrene block rubber (SEBS), styrene / butadiene / styrene block rubber (SBS), or styrene / isoprene / styrene block rubber. (SIS) is included.
In one embodiment, the above-mentioned adhesive layer contains an olefin system polymer.
In one embodiment, the insulating layer is a polyacrylate resin, polyurethane resin, polyimide resin, aramid resin, polyamide resin, EVOH resin, polyacrylonitrile resin, polyvinyl ether resin, polyvinyl alcohol resin. Including resin, polyethyleneimine resin, polyamideimide resin, polyetherimide resin or polyvinylidene fluoride resin.
In one embodiment, the insulating layer comprises butadiene rubber, styrene / butadiene rubber (SBR), ethylene / propylene / diene rubber (EPDM), styrene / butadiene / styrene block rubber (SBS), styrene / isoprene / styrene block rubber. (SIS), styrene / ethylene / butylene / styrene block rubber (SEBS), styrene / ethylene / propylene / styrene block rubber (SEPS), butyl rubber or polyisobutylene rubber.
In one embodiment, when the non-aqueous battery insulating tape is immersed in the following non-aqueous electrolyte A containing a predetermined electrolyte and solvent and left for 72 hours, the amount of gas generated from the non-aqueous electrolyte A is The amount is 0.3 cc / mg or less per 1 mg of the insulating inorganic filler.
<Nonaqueous electrolyte A>
Electrolyte: 1.4MLiPF ₆
Solvent: Mixed solvent of ethylene carbonate and diethyl carbonate; ethylene carbonate: diethyl carbonate (volume ratio) = 1: 2
Liquid temperature: 85 ° C
According to another aspect of the present invention, a nonaqueous battery is provided. This non-aqueous battery includes the insulating tape.

  The insulating tape of the present invention is an insulating tape used for a non-aqueous secondary battery, and can maintain insulation even under a severe environment such as being heated. Can increase.

1 is a schematic cross-sectional view of an insulating tape according to one embodiment of the present invention. (A)-(c) is a schematic sectional drawing of the insulating tape by another embodiment of this invention.

A. Overall Configuration of Insulating Tape FIG. 1 is a schematic sectional view of an insulating tape according to one embodiment of the present invention. The insulating tape 100 includes a base material 10 and an adhesive layer 20 disposed on one side or both sides (one side in the illustrated example) of the base material 10. In this embodiment, the base material 10 and / or the pressure-sensitive adhesive layer 20 includes an insulating inorganic filler (not shown). Although not shown, the insulating tape of the present invention may be provided with a release liner outside the pressure-sensitive adhesive layer for the purpose of protecting the pressure-sensitive adhesive surface until it is used.

  FIG. 2A is a schematic cross-sectional view of an insulating tape according to another embodiment of the present invention. This insulating tape 200 includes a base material 10 (base material 11 with an insulating layer) on which an insulating layer 30 is formed, and an adhesive layer 20 disposed on one side of the base material 11 with an insulating layer. In the insulating tape 200, the pressure-sensitive adhesive layer 20, the insulating layer 30, and the base material 10 are arranged in this order. The insulating layer 30 includes an insulating inorganic filler (not shown). In the insulating tape including the insulating layer, the base material and / or the pressure-sensitive adhesive layer may or may not contain an insulating inorganic filler.

  FIG. 2B is a schematic cross-sectional view of an insulating tape according to still another embodiment of the present invention. This insulating tape 200 ′ includes a base material 10 (base material 11 with an insulating layer) on which an insulating layer 30 is formed, and an adhesive layer 20 arranged on one side of the base material 11 with an insulating layer. In the insulating tape 200 ′, the pressure-sensitive adhesive layer 20, the base material 10, and the insulating layer 30 are arranged in this order.

  FIG. 2C is a schematic cross-sectional view of an insulating tape according to still another embodiment of the present invention. This insulating tape 200 ″ includes a base material 10 (base material 11 with an insulating layer) on which an insulating layer 30 is formed, and an adhesive layer 20 disposed on both sides of the base material 11 with an insulating layer. In the insulating tape 200 ″, the insulating layer 30 is disposed between the pressure-sensitive adhesive layer 20 and the base material 10.

  The insulating tape of the present invention is an insulating tape for non-aqueous batteries. The insulating tape of the present invention can be used, for example, for bonding a member and a member (for example, an electrode and a separator) in a non-aqueous electrolyte for a non-aqueous battery. The insulating tape of the present invention contains an insulating inorganic filler in the base material and / or the pressure-sensitive adhesive layer, or includes an insulating layer containing an insulating inorganic filler, so that the insulating tape includes a normal temperature and a high temperature (for example, Even at 400 ° C. or higher, it is difficult to shrink and soften, and sufficient insulation and adhesiveness can be exhibited. Furthermore, it is possible to prevent the deterioration of the non-aqueous electrolyte solution. Therefore, if the insulating tape of this invention is used for a non-aqueous battery, the safety and durability of the non-aqueous battery can be improved.

When the insulating tape of the present invention is immersed in the following non-aqueous electrolyte solution A containing a predetermined electrolyte and solvent and left for 72 hours, the amount of gas generated from the non-aqueous electrolyte solution A is 0. It is preferably 3 cc / mg or less, more preferably 0.2 cc / mg or less, and further preferably 0.1 cc / mg or less. The gas generated here is caused by deterioration of the non-aqueous electrolyte. In the present invention, it is possible to prevent deterioration of the non-aqueous electrolyte and prevent generation of unnecessary gas.
<Nonaqueous electrolyte A>
Electrolyte: 1.4MLiPF ₆
Solvent: Mixed solvent of ethylene carbonate and diethyl carbonate; ethylene carbonate: diethyl carbonate (volume ratio) = 1: 2
Liquid temperature: 85 ° C

  In the insulating tape of the present invention, the adhesive strength to SUS304BA is preferably 0.1 N / 10 mm to 10.0 N / 10 mm, more preferably 0.2 N / 10 mm to 5.0 N / 10 mm, in an environment of 25 ° C. It is. In the present specification, the adhesive strength refers to an adhesive strength measured by a method according to JIS Z 0237: 2000 (bonding condition: 2 kg roller 1 reciprocation, peeling speed: 300 mm / min, peeling angle 180 °).

B. Insulating inorganic filler As the insulating inorganic filler contained in the base material, the pressure-sensitive adhesive layer or the insulating layer, any appropriate insulating inorganic filler can be used as long as the effects of the present invention can be obtained. Preferably, an insulating inorganic filler that can prevent deterioration of the non-aqueous electrolyte is used.

  Preferably, as the insulating inorganic filler, an inorganic compound containing Mg atom, Al atom, Zr atom, Ti atom or B atom is used. Such an inorganic compound has poor reactivity with the non-aqueous electrolyte solution, and if the inorganic compound is used as the insulating inorganic filler, an insulating tape that hardly deteriorates the non-aqueous electrolyte solution can be obtained. More preferably, it is an inorganic compound containing Mg atom or Al atom.

  In one embodiment, an oxide of the inorganic compound is used. Specific examples of the oxide of the inorganic compound include magnesium oxide and alumina.

  In one embodiment, at least one selected from the group consisting of magnesium hydroxide, magnesium carbonate, magnesium oxide, alumina, boron nitride, and titanium oxide is used as the insulating inorganic filler. These compounds are particularly poor in reactivity with the non-aqueous electrolyte solution, and when the inorganic compound is used as the insulating inorganic filler, an insulating tape capable of remarkably preventing the deterioration of the non-aqueous electrolyte solution can be obtained. .

  In one embodiment, a compound having an isoelectric point greater than 7 (preferably 9 or more) is used as the insulating inorganic filler. If such a compound is used as an insulating inorganic filler, an insulating tape capable of remarkably preventing the deterioration of the nonaqueous electrolytic solution can be obtained.

  In one embodiment, the insulating inorganic filler is subjected to a surface treatment. Examples of the surface treatment include surface treatment using higher fatty acids, anionic surfactants, phosphate esters, silane coupling agents, titanate coupling agents, fatty acid esters of polyhydric alcohols, and the like. The insulating inorganic filler subjected to such a surface treatment has a surface treatment layer. By performing the above surface treatment, the dispersibility of the insulating inorganic filler can be improved, and the adhesion between the layer containing the insulating inorganic filler (base material, adhesive layer, insulating layer) and other layers is improved. Can do. Any appropriate method may be employed as the surface treatment method. Examples of higher fatty acids that can be used include stearic acid and palmitic acid. As fatty acid esters of polyhydric alcohol, for example, fatty acid esters containing glycerin, ethylene glycol, propylene glycol, pentaerythritol and the like can be used.

  The average particle diameter of the insulating inorganic filler is preferably 0.1 μm to 10 μm, more preferably 0.1 μm to 8 μm, and further preferably 0.1 μm to 5 μm. If an insulating inorganic filler having an average particle size in such a range is used, an insulating tape having excellent insulating properties and excellent heat resistance can be obtained. In addition, in this specification, an average particle diameter shows the 50% average particle diameter (number basis, primary particle diameter and its aggregate are included) by a laser scattering method.

The BET specific surface area of the insulating inorganic filler is preferably 200 m ² / g or less, more preferably 160 m ² / g or less, still more preferably 100 m ² / g or less, and particularly preferably 50 m ² / g. Or less, and most preferably 10 m ² / g or less. In such a range, if an insulating inorganic filler having a BET specific surface area in such a range is used, an insulating tape having excellent insulating properties and excellent heat resistance can be obtained. The smaller the BET specific surface area of the insulating inorganic filler is, the smaller the reactivity with the electrolytic solution is.

C. The material for the substrate the substrate, any suitable material may be used. Examples of the substrate include fiber-based substrates such as woven fabrics and nonwoven fabrics; paper-based substrates; plastic-based substrates such as resin films. Among them, it is preferable to use a plastic base material in that it is difficult to dissolve in the electrolytic solution and cause deterioration of the electrolytic solution, and particularly from polyimide, polyamide, polyamideimide, polyphenylene sulfide, or polyolefin (for example, polypropylene). It is preferable to use a plastic base material to be formed. Moreover, it is preferable to use a plastic base material formed from polypropylene because it is inexpensive. The substrate may be a substrate having a multilayer structure. When a base material has a form of a multilayer, each layer may be the same base material and may combine a different base material.

  The thickness of the substrate is preferably 2 μm to 50 μm, more preferably 10 μm to 40 μm. Within such a range, an insulating tape having a thickness suitable for a non-aqueous battery can be obtained. Moreover, when the said insulating inorganic filler is included in a base material and insulation is provided, the outstanding insulation can be obtained by making the thickness of a base material into the said range.

  When the base material contains an insulating inorganic filler, the content of the insulating inorganic filler in the base material is preferably 50 parts by weight to 500 parts by weight, more preferably 100 parts by weight of the base material. 100 parts by weight to 300 parts by weight. If it is such a range, the insulating tape which is excellent in insulation and excellent in adhesiveness with the layer (adhesive layer or insulating layer) adjacent to a base material can be obtained.

D. Adhesive layer The adhesive layer comprises any suitable base polymer. Examples of the base polymer contained in the pressure-sensitive adhesive layer include acrylic polymers, rubber polymers, olefin polymers, and silicone polymers.

  As the acrylic polymer, an acrylic polymer (homopolymer or copolymer) using one or more (meth) acrylic acid alkyl esters as monomer components is preferably used. Examples of the (meth) acrylic acid alkyl ester include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, n-butyl (meth) acrylate, ( Isobutyl acrylate, s-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, isopentyl (meth) acrylate, hexyl (meth) acrylate, (meth) acrylic acid Heptyl, octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, (meth) acrylic Isodecyl acid, undecyl (meth) acrylate, dodecyl (meth) acrylate (Meth) acrylic acid tridecyl, (meth) acrylic acid tetradecyl, (meth) acrylic acid pentadecyl, (meth) acrylic acid hexadecyl, (meth) acrylic acid heptadecyl, (meth) acrylic acid octadecyl, (meth) acrylic acid nonadecyl, ( Examples include (meth) eicosyl acrylate. Preferably, a (meth) acrylic acid alkyl ester having a linear or branched alkyl group having 1 to 20 carbon atoms (more preferably 4 to 20 carbon atoms) is used.

  The content ratio of the (meth) acrylic acid alkyl ester is preferably 50% by weight or more, more preferably 50% by weight to 100% by weight, and still more preferably, with respect to all the structural units constituting the acrylic polymer. Is 70% to 100% by weight.

  In one embodiment, the acrylic polymer preferably has an alkyl group having 4 or more carbon atoms in the side chain, more preferably an alkyl group having 6 or more carbon atoms, and has 8 to 20 carbon atoms. It is more preferable to have an alkyl group. In the polymer, the content of the structural unit having an alkyl group having 4 or more carbon atoms in the side chain is preferably 50% by weight or more, more preferably 70% by weight with respect to all the structural units constituting the polymer. % Or more, more preferably 75 wt% to 100 wt%. By using such an acrylic polymer, it is possible to form a pressure-sensitive adhesive layer that has poor affinity for the electrolytic solution and is excellent in durability in the electrolytic solution. Moreover, it is possible to obtain an insulating tape that hardly causes deterioration of the non-aqueous electrolyte solution.

  The acrylic polymer is a structural unit derived from another monomer component that can be copolymerized with the (meth) acrylic acid alkyl ester, if necessary, for the purpose of modifying cohesive strength, heat resistance, crosslinkability, and the like. May be included. Examples of such monomer components include carboxyl group-containing monomers such as acrylic acid, methacrylic acid, carboxyethyl acrylate, carboxypentyl acrylate, itaconic acid, maleic acid, fumaric acid, and crotonic acid; maleic anhydride, itaconic anhydride Acid anhydride monomers such as hydroxyethyl (meth) acrylate, hydroxypropyl (meth) acrylate, hydroxybutyl (meth) acrylate, hydroxyhexyl (meth) acrylate, hydroxyoctyl (meth) acrylate, (meth) Hydroxyl group-containing monomers such as hydroxydecyl acrylate, hydroxylauryl (meth) acrylate, (4-hydroxymethylcyclohexyl) methyl methacrylate; styrene sulfonic acid, allyl sulfonic acid, 2- (meth) acrylamide Sulfonic acid group-containing monomers such as 2-methylpropanesulfonic acid, (meth) acrylamidepropanesulfonic acid, sulfopropyl (meth) acrylate, (meth) acryloyloxynaphthalenesulfonic acid; (meth) acrylamide, N, N-dimethyl (meta ) (N-substituted) amide monomers such as acrylamide, N-butyl (meth) acrylamide, N-methylol (meth) acrylamide, N-methylolpropane (meth) acrylamide; aminoethyl (meth) acrylate, (meth) acrylic (Meth) acrylic acid aminoalkyl monomers such as N, N-dimethylaminoethyl acid, t-butylaminoethyl (meth) acrylate; (meth) methacrylic acid (meth) acrylate, ) Alkoxy acrylate Rutile monomers; maleimide monomers such as N-cyclohexylmaleimide, N-isopropylmaleimide, N-laurylmaleimide, N-phenylmaleimide; N-methylitaconimide, N-ethylitaconimide, N-butylitaconimide, N-octyl Itaconimide monomers such as itaconimide, N-2-ethylhexylitaconimide, N-cyclohexylitaconimide, N-laurylitaconimide; N- (meth) acryloyloxymethylenesuccinimide, N- (meth) acryloyl-6-oxyhexamethylene Succinimide monomers such as succinimide and N- (meth) acryloyl-8-oxyoctamethylenesuccinimide; vinyl acetate, vinyl propionate, N-vinyl pyrrolidone, methyl vinyl pyro Vinyl such as lidone, vinylpyridine, vinylpiperidone, vinylpyrimidine, vinylpiperazine, vinylpyrazine, vinylpyrrole, vinylimidazole, vinyloxazole, vinylmorpholine, N-vinylcarboxylic amides, styrene, α-methylstyrene, N-vinylcaprolactam Cyanoacrylate monomers such as acrylonitrile and methacrylonitrile; epoxy group-containing acrylic monomers such as glycidyl (meth) acrylate; polyethylene glycol (meth) acrylate, polypropylene glycol (meth) acrylate, (meth) acrylic acid Glycol acrylic ester monomers such as methoxyethylene glycol and (meth) acrylic acid methoxypolypropylene glycol; (meth) acrylic acid tetrahydrofur Acrylic acid ester monomers having heterocycles such as ril, fluorine (meth) acrylate, silicone (meth) acrylate, halogen atoms, silicon atoms, etc .; hexanediol di (meth) acrylate, (poly) ethylene glycol di (meth) acrylate , (Poly) propylene glycol di (meth) acrylate, neopentyl glycol di (meth) acrylate, pentaerythritol di (meth) acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tri (meth) acrylate, dipentaerythritol hexa Polyfunctional monomers such as (meth) acrylates, epoxy acrylates, polyester acrylates, urethane acrylates; olefinic monomers such as isoprene, butadiene, isobutylene; And vinyl ether monomers such as vinyl ether. These monomer components may be used alone or in combination of two or more.

  The content ratio of the structural units derived from the other monomer components is preferably less than 20% by weight and more preferably 15% by weight or less with respect to all the structural units constituting the acrylic polymer.

  The weight average molecular weight of the acrylic polymer is preferably 50,000 to 5,000,000, more preferably 100,000 to 2,000,000, and further preferably 200,000 to 1,500,000. If it is such a range, the insulating tape which is hard to elute an adhesive component in electrolyte solution and is excellent in adhesiveness can be obtained. The said weight average molecular weight can be obtained by standard polystyrene conversion, for example using a gel permeation chromatography.

  Examples of the rubber-based polymer include natural rubber; butyl rubber, polyisobutylene rubber, polyisoprene rubber, styrene / butadiene (SB) rubber, styrene / isoprene (SI) rubber, styrene / isoprene / styrene block rubber (SIS), and styrene.・ Butadiene / styrene block rubber (SBS), styrene / ethylene / butylene / styrene block rubber (SEBS), styrene / ethylene / propylene / styrene block rubber (SEPS), styrene / ethylene / propylene block rubber (SEP), recycled rubber, And synthetic rubbers such as butyl rubber, polyisobutylene, and modified products thereof. Of these, butyl rubber and polyisobutylene rubber are preferable. By using these rubber-based polymers, it is possible to form a pressure-sensitive adhesive layer that has poor affinity for the electrolytic solution and is excellent in durability. Moreover, it is possible to obtain an insulating tape that hardly causes deterioration of the non-aqueous electrolyte solution.

  Any appropriate polymer is used as the olefin polymer as long as the effects of the present invention are obtained. If an olefin polymer is used, it is possible to form a pressure-sensitive adhesive layer that has poor affinity for the electrolyte solution and is excellent in durability. Moreover, it is possible to obtain an insulating tape that hardly causes deterioration of the non-aqueous electrolyte solution. Specific examples of the olefin polymer include, for example, ethylene, propylene, 1-butene, 1-hexene, 3-methyl-1-butene, 4-methyl-1-pentene, 1-heptene, 1-octene and 1-decene. And a homopolymer or copolymer having a structural unit derived from an α-olefin having 2 to 10 carbon atoms. Preferably, ethylene-based polymers such as high-density polyethylene, low-density polyethylene, and ethylene-vinyl acetate copolymer (EVA); propylene-based polymers such as polypropylene are used as the olefin polymer. These polymers are advantageous in terms of cost and can form an adhesive layer having excellent low-temperature adhesiveness.

  In one embodiment, acid-modified polyolefin is used. If an acid-modified polyolefin is used, an insulating tape exhibiting excellent adhesiveness can be obtained even in an electrolytic solution. The acid-modified polyolefin can be obtained, for example, by graft polymerization of an unsaturated carboxylic acid and / or an acid anhydride thereof to the polyolefin. The acid-modified polyolefin can be obtained by graft polymerization of an unsaturated carboxylic acid and / or an acid anhydride of the unsaturated carboxylic acid to the olefin polymer. Preferably, a maleic acid-modified polyolefin obtained by graft polymerization of maleic acid to an olefin polymer or a maleic anhydride modified polyolefin obtained by graft polymerization of maleic anhydride to an olefin polymer is used. The graft polymerization rate in the acid-modified polyolefin is preferably 0.05 wt% to 10 wt%, more preferably 0.1 wt% to 5 wt%.

  As the silicone-based polymer, for example, silicone rubber or silicone resin containing organopolysiloxane as a main component can be used. Moreover, you may use the polymer bridge | crosslinked by adding a siloxane type crosslinking agent and a peroxide type crosslinking agent to these rubber | gum or resin.

  The glass transition temperature of the base polymer is preferably −20 ° C. or lower. If it is such a range, the adhesive layer which is excellent in adhesive force can be formed.

  The pressure-sensitive adhesive layer may contain any appropriate additive as required. Examples of the additive include a crosslinking agent, a polymerization initiator, a tackifier, a plasticizer (for example, trimellitic acid ester plasticizer, pyromellitic acid ester plasticizer), pigment, dye, filler, and anti-aging. Agents, conductive materials, ultraviolet absorbers, light stabilizers, release modifiers, softeners, surfactants, flame retardants, antioxidants, and the like.

  The thickness of the pressure-sensitive adhesive layer is preferably 1 μm to 30 μm, more preferably 3 μm to 15 μm. If it is such a range, the insulating tape excellent in adhesive force and durability can be obtained. Moreover, when the insulating inorganic filler is included in the pressure-sensitive adhesive layer to provide insulation, excellent insulating properties can be obtained by setting the thickness of the pressure-sensitive adhesive layer in the above range.

  When the pressure-sensitive adhesive layer contains an insulating inorganic filler, the content of the insulating inorganic filler in the pressure-sensitive adhesive layer is preferably 10 parts by weight to 200 parts by weight with respect to 100 parts by weight of the base polymer. Preferably it is 20 weight part-150 weight part, More preferably, it is 50 weight part-120 weight part. If it is such a range, the insulating tape which is excellent in insulation and excellent in adhesiveness with the layer (base material or insulating layer) adjacent to an adhesive layer can be obtained.

E. Insulating layer The insulating layer contains any appropriate binder resin and the insulating inorganic filler. Examples of the binder resin include polyacrylate resins, polyurethane resins, polyimide resins, aramid resins, polyamide resins, ethylene / vinyl copolymer (EVOH) resins, polyacrylonitrile resins, polyvinyl ether resins, Polyvinyl alcohol resin, polyethyleneimine resin, polyamideimide resin, polyetherimide resin, polyvinylidene fluoride resin and the like are used. Further, rubber polymers such as butadiene rubber, styrene / butadiene rubber (SBR), ethylene / propylene / diene rubber (EPDM), SBS, SIS, SEBS, SEPS, butyl rubber, and polyisobutylene rubber may be used.

  The content ratio of the insulating inorganic filler in the insulating layer is preferably 10 parts by weight to 1000 parts by weight, and more preferably 100 parts by weight to 500 parts by weight with respect to 100 parts by weight of the insulating layer. If it is such a range, it is excellent in insulation, is excellent in adhesiveness with a layer (adhesive layer and / or substrate) adjacent to the insulating layer, and has practically excellent flexibility. Tape can be obtained.

  The thickness of the insulating layer is preferably 0.1 μm to 10 μm, more preferably 1 μm to 5 μm. If it is such a range, the insulating tape excellent in adhesive force, durability, insulation, and a softness | flexibility can be obtained.

F. Method for Producing Insulating Tape The insulating tape can be produced by any appropriate method. For example, an insulating tape composed of a base material and an adhesive layer can be obtained by applying an adhesive layer forming composition on the base material. An insulating tape further comprising an insulating layer can be obtained by applying an insulating layer forming composition on a substrate and then applying an adhesive layer forming composition on the insulating layer. . The composition for forming the pressure-sensitive adhesive layer contains the above base polymer and any appropriate additive. Moreover, the composition for insulating layer formation contains the said binder resin and arbitrary appropriate additives. Any of the base material, the pressure-sensitive adhesive layer forming composition and the insulating layer forming composition contains the insulating inorganic filler.

  Arbitrary appropriate methods may be employ | adopted as a coating method of the composition for adhesive layer formation, and the composition for insulating layer formation. For example, methods such as screen printing, spray coating, gravure coating, flexographic coating, and die coater can be employed.

  EXAMPLES Hereinafter, although an Example demonstrates this invention concretely, this invention is not limited to these Examples at all. The evaluation methods in the examples are as follows.

(1) Electrolyte deterioration test After putting 80 μl of non-aqueous electrolyte solution having the following composition and a sample (10 mm × 30 mm) prepared by bonding an insulating tape to an aluminum foil in an aluminum laminate pack, an inert gas atmosphere Inside, the aluminum laminate pack was sealed by heat sealing to obtain a sample.
This sample was taken out of the inert gas atmosphere, and the initial volume was measured with an electronic hydrometer MD-200S manufactured by Alpha Mirage. Thereafter, the sample was stored at 85 ° C. for 72 hours, the volume of the sample after the heat test treatment was measured in the same manner, and the volume change amount per 1 mg of filler was determined by the following formula. This volume change corresponds to the amount of gas generated due to electrolyte deterioration.
Generated gas amount [cc / mg] = (volume after test (cc) −volume before test (cc)) / weight of insulating inorganic filler in insulating tape (mg)
<Composition of non-aqueous electrolyte solution>
Electrolyte: 1.4MLiPF ₆
Solvent: Mixed solvent of ethylene carbonate and diethyl carbonate; ethylene carbonate: diethyl carbonate (volume ratio) = 1: 2

(2) Adhesive strength test Insulating tape was bonded to a stainless steel plate (SUS304BA) (bonding condition: 2kg roller 1 reciprocation) and precision universal testing machine Autograph (manufactured by Shimadzu Corporation) under the following conditions. The peel force was measured.
<Measurement conditions>
Peeling speed: 300mm / min
Peel angle: 180 °
Peeling temperature: normal temperature (25 ° C)

(3) Thermal decomposition measurement (TG-DTA)
The thermal decomposition residue of the layer containing the insulating filler in the insulating tape was measured under the following measurement conditions. Note that an insulating tape with a large amount of thermal decomposition residue is an insulating tape in which an insulating inorganic filler remains even at high temperatures, and is excellent in insulation at high temperatures.
<Measurement conditions>
Apparatus: Discovery TGA manufactured by TA Instruments
Atmospheric gas: N2 (25 ml / min)
Container: Platinum container temperature program: RT → 1000 ° C
Temperature increase rate: 10 ° C / min

[Example 1]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and magnesium hydroxide particles as an insulating inorganic filler (trade name “Magsees S6” manufactured by Kamishima Chemical Industry Co., Ltd., average particle size: 1.0 μm, BET specific surface area: 4.5 m ² / g) 50 parts by weight and ² parts by weight of polyisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”) were mixed to prepare an adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 7 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 2]
100 parts by weight of polyurethane resin (trade name “RAMIC SR” manufactured by Dainichi Seika Kogyo Co., Ltd.) as a binder resin, alumina particles (trade name “LS-110F” manufactured by Nippon Light Metal Co., Ltd.), average particle diameter: 1.1 μm, BET specific surface area: 3.2 m ² / g) 500 parts by weight were added to prepare an insulating layer forming composition. The obtained composition for forming an insulating layer was coated on a substrate (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) so that the thickness after drying was 3 μm. A substrate with an insulating layer was produced.
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and 2 parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a pressure-sensitive adhesive layer forming composition.
An adhesive tape (adhesive layer / insulating layer / base material) having a pressure-sensitive adhesive layer having a thickness of 7 μm is coated on the insulating layer of the base material with the insulating layer by applying the composition for forming an adhesive layer. Obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 3]
A monomer composition containing 75 parts by weight of 2-ethylhexyl acrylate, 20 parts by weight of acryloylmorpholine, 3 parts by weight of acrylic acid, and 0.1 part by weight of 2-hydroxyl acrylate was polymerized to obtain an acrylic polymer (weight average molecular weight). : 1.2 million).
100 parts by weight of the obtained acrylic polymer and magnesium hydroxide particles as an insulating inorganic filler (manufactured by Sakai Chemical Industry Co., Ltd., trade name “MGZ-1”, average particle size: 0.8 μm, BET specific surface area: 6. 0 m ² / g) 50 parts by weight and ² parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a pressure-sensitive adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 10 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 4]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 4 parts by weight of 2-hydroxyethyl acrylate was polymerized to obtain an acrylic polymer (weight average molecular weight: 1,000,000).
100 parts by weight of the obtained acrylic polymer and magnesium hydroxide particles as an insulating inorganic filler (manufactured by Sakai Chemical Industry Co., Ltd., trade name “MGZ-3”, average particle size: 0.1 μm, BET specific surface area: 20 m ² / G) 20 parts by weight of polyisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”) was mixed to prepare an adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 7 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 5]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and magnesium hydroxide particles as an insulating inorganic filler (manufactured by Kyowa Chemical Industry Co., Ltd., trade name “Kisuma 5P”, average particle size: 0.8 μm, BET specific surface area: 5.7 m) ² / g) 75 parts by weight and ² parts by weight of polyisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”) were mixed to prepare an adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 7 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 6]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 4 parts by weight of 2-hydroxyethyl acrylate was polymerized to obtain an acrylic polymer (weight average molecular weight: 1,000,000).
100 parts by weight of the obtained acrylic polymer and magnesium oxide particles as an insulating inorganic filler (trade name “Magsarat 30” manufactured by Kyowa Chemical Industry Co., Ltd., average particle size: 3.1 μm, BET specific surface area: 40 m ² / g ) 30 parts by weight and 2 parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a composition for forming an adhesive layer.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 12 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 7]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 4 parts by weight of 2-hydroxyethyl acrylate was polymerized to obtain an acrylic polymer (weight average molecular weight: 1,000,000).
100 parts by weight of the obtained acrylic polymer and magnesium oxide particles as an insulating inorganic filler (trade name “Magsarat 150”, manufactured by Kyowa Chemical Industry Co., Ltd., average particle size: 4.4 μm, BET specific surface area: 155 m ² / g ) 30 parts by weight and 2 parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a composition for forming an adhesive layer.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 20 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 8]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and magnesium oxide particles as an insulating inorganic filler (manufactured by Kyowa Chemical Industry Co., Ltd., trade name “Pyroxuma 5301K”, average particle size: 2.8 μm, BET specific surface area: 1.4 m ² / G) 50 parts by weight and 2 parts by weight of polyisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”) were mixed to prepare an adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is coated on a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 15 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 9]
70 parts by weight of polyisobutylene (BASF Japan, trade name “Opanol B80”, weight average molecular weight: 750,000) and polyisobutylene (BASF Japan, trade name “Opanol B50”, weight average molecular weight: 340,000) 30 Parts by weight, 25 parts by weight of hydrogenated petroleum resin (trade name “Arcon P-125” manufactured by Arakawa Chemical Industries, Ltd.), and aluminum hydroxide particles (made by Showa Denko Co., Ltd., trade name “Hijilite” H42 ”, average particle diameter: 1.0 μm, BET specific surface area: 5.0 m ² / g) were mixed with 30 parts by weight to prepare a composition for forming an adhesive layer.
This pressure-sensitive adhesive layer forming composition is coated on a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 8 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 10]
Instead of 500 parts by weight of alumina particles (manufactured by Nippon Light Metal Co., Ltd., trade name “LS-110F”, average particle size: 1.1 μm, BET specific surface area: 3.2 m ² / g), silica particles (manufactured by Tosoh Silica Co., Ltd.) The product name “NIPSIL E220A”, average particle size: 1.0 μm, BET specific surface area: 147 m ² / g) was used in the same manner as in Example 2 except that 100 parts by weight was used to obtain an insulating tape.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 11]
Instead of 500 parts by weight of alumina particles (manufactured by Nippon Light Metal Co., Ltd., trade name “LS-110F”, average particle size: 1.1 μm, BET specific surface area: 3.2 m ² / g), aluminum hydroxide particles (Nippon Light Metal Co., Ltd.) An insulating tape was obtained in the same manner as in Example 2 except that the product name “BF013”, average particle size: 1.0 μm, and BET specific surface area 4: 0 m ² / g) were used.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 12]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and magnesium oxide particles as an insulating inorganic filler (trade name “PSF-WR” manufactured by Kamishima Chemical Industry Co., Ltd., average particle size: 2.0 μm, BET specific surface area: 6.6 m ² / g) 100 parts by weight and ² parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a composition for forming an adhesive layer.
Insulation having a pressure-sensitive adhesive layer having a thickness of 5 μm by coating this pressure-sensitive adhesive layer-forming composition on a base material (polypropylene film, manufactured by Toray Industries, Inc., trade name “Trephan”, thickness: 12 μm) I got a tape.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 13]
100 parts by weight of polyurethane resin (trade name “NB300” manufactured by Dainichi Seika Kogyo Co., Ltd.) as a binder resin and 20 parts by weight of polyisocyanate compound (trade name “Ramic B Hardener” manufactured by Dainichi Seika Kogyo Co., Ltd.) Magnesium oxide particles (trade name “PSF-WR”, average particle diameter: 2.0 μm, BET specific surface area: 6.6 m ² / g) 500 parts by weight as a conductive inorganic filler, A forming composition was prepared. The obtained composition for forming an insulating layer was coated on a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) so that the thickness after drying was 5 μm. A substrate with an insulating layer was produced.
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and 2 parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a pressure-sensitive adhesive layer forming composition.
An adhesive tape (adhesive layer / insulating layer / base material) having a pressure-sensitive adhesive layer having a thickness of 7 μm is coated on the insulating layer of the base material with the insulating layer by applying the composition for forming an adhesive layer. Obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 14]
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 10 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1,200,000).
100 parts by weight of the obtained acrylic polymer and magnesium oxide particles as an insulating inorganic filler (trade name “PSF-WR” manufactured by Kamishima Chemical Industry Co., Ltd., average particle size: 2.0 μm, BET specific surface area: 6.6 m ² / g) 75 parts by weight and ² parts by weight of polyisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name “Coronate L”) were mixed to prepare an adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is applied onto a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 7 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 15]
100 parts by weight of polyisobutylene (BASF Japan, trade name “Opanol B80”, weight average molecular weight: 750,000) and polyisobutylene (BASF Japan, trade name “Opanol B12”, weight average molecular weight: 51,000) ) 30 parts by weight and magnesium oxide particles as an insulating inorganic filler (trade name “Pyroxuma 5301K” manufactured by Kyowa Chemical Industry Co., Ltd., average particle size: 2.8 μm, BET specific surface area: 1.4 m ² / g) 50 weights Were mixed with each other to prepare a pressure-sensitive adhesive layer forming composition.
This pressure-sensitive adhesive layer forming composition is coated on a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) to form a pressure-sensitive adhesive layer having a thickness of 15 μm. An insulating tape having was obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 16]
Instead of 500 parts by weight of magnesium oxide particles (trade name “PSF-WR”, manufactured by Kamishima Chemical Industry Co., Ltd., average particle size: 2.0 μm, BET specific surface area: 6.6 m ² / g), boron nitride particles (Showa Denko) Insulating tape was obtained in the same manner as in Example 13 except that 300 parts by weight, manufactured by the company, trade name “UHP-S2”, average particle size: 0.5 μm, BET specific surface area: 10 m ² / g) was used. It was.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 17]
100 parts by weight of meta-aramid resin (trade name “Conex” manufactured by Teijin Limited) as binder resin, titanium oxide particles (trade name “TITONE R-42” manufactured by Sakai Chemical Industry Co., Ltd., average particle size) as insulating inorganic filler (Diameter: 0.29 μm, BET specific surface area: 5.1 m ² / g) and 300 parts by weight were added to prepare an insulating layer forming composition. The obtained composition for forming an insulating layer was coated on a base material (polyimide film, manufactured by Toray DuPont, trade name “Kapton 100H”, thickness: 25 μm) so that the thickness after drying was 5 μm. A substrate with an insulating layer was produced.
A monomer composition containing 100 parts by weight of 2-ethylhexyl acrylate and 5 parts by weight of acrylic acid was polymerized to obtain an acrylic polymer (weight average molecular weight: 1.3 million).
100 parts by weight of the obtained acrylic polymer and 2 parts by weight of polyisocyanate (trade name “Coronate L”, manufactured by Nippon Polyurethane Co., Ltd.) were mixed to prepare a pressure-sensitive adhesive layer forming composition.
An adhesive tape (adhesive layer / insulating layer / base material) having a pressure-sensitive adhesive layer having a thickness of 7 μm is coated on the insulating layer of the base material with the insulating layer by applying the composition for forming an adhesive layer. Obtained.
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Example 18]
Instead of 500 parts by weight of alumina particles (manufactured by Nippon Light Metal Co., Ltd., trade name “LS-110F”, average particle size: 1.1 μm, BET specific surface area: 3.2 m ² / g), magnesium carbonate particles (Kanshima Chemical Industry Co., Ltd.) Insulating tape was obtained in the same manner as in Example 2 except that 300 parts by weight were manufactured and trade name “MSS”, average particle diameter: 1.2 μm, BET specific surface area: 5.5 m ² / g). .
The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

[Comparative Example 1]
An insulating tape was obtained in the same manner as in Example 1 except that the composition for forming an adhesive layer was prepared without using an insulating inorganic filler. The obtained insulating tape was subjected to the evaluations (1) to (3). The results are shown in Table 1.

10 Substrate 20 Adhesive layer 30 Insulating layer 100, 200 Insulating tape

Claims (12)

A substrate and a pressure-sensitive adhesive layer disposed on one or both sides of the substrate;
The base material and / or the pressure-sensitive adhesive layer contains an insulating inorganic filler,
Insulating tape for non-aqueous batteries. A substrate with an insulating layer, and an adhesive layer disposed on one side or both sides of the substrate with an insulating layer,
The insulating layer includes an insulating inorganic filler;
Insulating tape for non-aqueous batteries.   The insulating tape for non-aqueous batteries according to claim 1 or 2, wherein the insulating inorganic filler is an inorganic compound containing Mg, Al, Zr, Ti, or B.   The insulation for non-aqueous batteries according to claim 1 or 2, wherein the insulating inorganic filler is at least one selected from the group consisting of magnesium hydroxide, magnesium carbonate, magnesium oxide, alumina, boron nitride, and titanium oxide. tape.   The said insulating inorganic filler has a surface treatment layer by fatty acid esters of higher fatty acids, anionic surfactants, phosphate esters, silane coupling agents, titanate coupling agents or polyhydric alcohols. The insulating tape for nonaqueous batteries in any one of. The pressure-sensitive adhesive layer contains an acrylic polymer,
The acrylic polymer has an alkyl group having 4 or more carbon atoms in the side chain.
The insulating tape for nonaqueous batteries according to any one of claims 1 to 5.   The pressure-sensitive adhesive layer comprises butyl rubber, polyisobutylene rubber, styrene / ethylene / butylene / styrene block rubber (SEBS), styrene / butadiene / styrene block rubber (SBS), or styrene / isoprene / styrene block rubber (SIS). Item 6. The non-aqueous battery insulating tape according to any one of Items 1 to 5.   The insulating tape for nonaqueous batteries according to claim 1, wherein the pressure-sensitive adhesive layer contains an olefin polymer.   The insulating layer is a polyacrylate resin, polyurethane resin, polyimide resin, aramid resin, polyamide resin, EVOH resin, polyacrylonitrile resin, polyvinyl ether resin, polyvinyl alcohol resin, polyethyleneimine resin, The insulating tape for nonaqueous batteries according to any one of claims 2 to 8, comprising a polyamideimide resin, a polyetherimide resin, or a polyvinylidene fluoride resin.   The insulating layer is made of butadiene rubber, styrene / butadiene rubber (SBR), ethylene / propylene / diene rubber (EPDM), styrene / butadiene / styrene block rubber (SBS), styrene / isoprene / styrene block rubber (SIS), styrene / ethylene. The non-aqueous battery insulating tape according to claim 2, comprising butylene / styrene block rubber (SEBS), styrene / ethylene / propylene / styrene block rubber (SEPS), butyl rubber or polyisobutylene rubber. When the non-aqueous battery insulating tape is immersed in the following non-aqueous electrolyte A containing a predetermined electrolyte and solvent and allowed to stand for 72 hours, the amount of gas generated from the non-aqueous electrolyte A per mg of insulating inorganic filler The insulating tape for nonaqueous batteries according to any one of claims 1 to 10, which is 0.3 cc / mg or less.
<Nonaqueous electrolyte A>
Electrolyte: 1.4MLiPF ₆
Solvent: Mixed solvent of ethylene carbonate and diethyl carbonate; ethylene carbonate: diethyl carbonate (volume ratio) = 1: 2
Liquid temperature: 85 ° C A non-aqueous battery comprising the insulating tape according to claim 1.

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